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1、动词按其动作发生的方式、发生过程的长短可分为延续性动词与非延续性动词。一.延续性动词表示能够延续的动作,如：learn,work,stand,lie,know,walk,keep,have,wait,watch,sing,read,sleep,live,stay等。延续性动词可以与表示时间段的状语连用。表示时间段的短语有:for+一段时间,for2years;since从句,sincehecamehere;since+时间点名词,sincelastyear,since5daysago;howlong;foralongtime等。例:Hehaslivedherefor6years.Yo
2、ucankeepthebookfor5days.Istayedtherefor2weekslastyear.Howlongdidyoustaytherelastyear?二.非延续性动词也称终止性动词、瞬间动词,表示不能延续的动作,这种动作发生后立即结束。如:open,die,close,begin,finish,come,go,move,borrow,lend,buy等。非延续性动词在肯定句中与表示时间点的状语连用，如：twoyearsago;at5o'clock;例:Hedied5yearsago.否定的终止性动词可以与表示时间段的时间状语连用。例:Ihaven'tlefther
3、efor3years.Ihaven'theardfromhimfor3weeks.中学阶段常用延续性动词与非延续性动词之间的转换如下：Come→behereGo→bethereleave→beaway,borrow→keep,buy→have,begin/start→beon,die→bedead,moveto→livein,finish→beover,join→bein/beamemberof,opensth.→keepsth.open,feelill→beill,getup→beup,catchacold→haveacoldcomehere→behere,gothere→beth
4、ere, become→be, comeback→beback, fallasleep→beasleep, getto/arrive/reach→be(in), leave→beawayfrom, gettoknow→know,go(get)out→beout， puton→wear；请注意下列句子动词的转换使用：例:1.Theoldmandied4yearsago.----Theoldmanhasbeendeadfor4years.----Itis4yearssincetheoldmandied.----Fouryearshaspassedsincetheoldmandied.
5、2.HejoinedtheParty2yearsago.-----HehasbeeninthePartyfor2years.3.Iboughtthebook5daysago.----Ihavehadthebookfor5days.巩固练习：1.Whenhearrivedatthebusstop,thebus________for20minutes.A.hasleftB.hadleftC.hasbeenawayD.hadbeenaway2.I______theLeaguefor5yearssofar.A.joinedB.havejoinedC.havebeeninD.havegonet
6、o3.Thefactory________sincetheFebruaryof1988.A.hasbeenopenB.hasopenedC.wasopenD.opened4.MaryandRose_______friendssincetheymetin2000.A.havemadeB.havebeenC.madeD.havebecome5.Youmustn't________untilhecomesback.A.beawayB.leaveC.beleftD.haveleft6.Themeeting_______foraweeknow.A.hasfinishedB.hasendedC.
7、hasbeenoverD.ended7.MissGao______thisschoolfornearly5years.A.hasbeeninB.hascometoC.hastaughtD.taught8.Ben______ateacherfor4years.A.hasbeenB.hasbecomeC.wasD.became9.I______homeforaweek.A.havereturnedB.havebeenbackC.returnedD.amretu
